What head should I get for a 318

Yeah I think the cam would help and I think when I change it thats all I do for 2-3 weeks. Try to jet the carb up and down a little and drive it alot and check it out good. Afterwards though I was thinking of putting the late 80's 4323302 cylinder heads on with the smaller chambers to boost the compression up. The ports are a bit small cc wise but I thought the 1.88 and 1.6 valve with a little porting would more than make up for it. The heads will have new valve springs that the cam calls for but I was going to use my weaker springs to break the new cam in. Not sure if my springs are all that weak, the motor just stops pulling at high rpms, does not break up at all. Have crane springs in now with .030 shims but they are 8 years old, cam is 5 years old but I only drive 3000-5000 miles a year.

Motor was breaking up a bit at around 5400 before I swap some speed pro adjustable rockers on which I got from e-bay for $130 with push rods. All aftermaket stuff not 60's stuff-I think I got a good deal, it had the shafts too.